Power-transmitting mechanism.



UNITED STATES PATENT OFFICE.

CHARLES DAVID MCCLINTOCK, 0F FRUI'IVALE, CALIFORNIA, ASSIGNOR 0FONE-HALF I T0 SAMUEL RUSSELL BOGUE, OF SAN FRANCISCO, CALIFORNIA.

POWER-TRANSMITTING MECHANISM.

Specification of Letters Patent.

Patented Sept. 20, 1910.

To all whom it may concern:

Be it known that 1, CHARLES DAVID MC- CLINTOCK, a citizen of the UnitedStates, residing at F ruitvale, in the county of Alameda and State ofCalifornia, have invented certain new and useful Improvements inPower-Transmitting Mechanism, of which the following is a specification.

My invention relates to that class of power-transmitting mechanism inwhich a controllable difference in rotative velocity between the drivingand the driven shafts is provided for.

My invention consists, in connection with the driving and driven shafts,of the novel fluid-resistance device directly interposed between androtatively differentially connected with said shafts and means forcontrolling the resistance of said device, as I shall now fullydescribe.

In the devices which I have illustrated in the drawings, and hereafterparticularly described, -I depend upon the well known principles of theincompressibility of liquids when confined, andthe fluid frictiongenerated by a stream of liquid when issuing through a more or lessrestricted orifice under pressure.

The object of my invention is to provide a simple and effective meanswhereby a driving shaft may be connected to a driven shaft in such a wayas to enable an operator to vary their speed ratios determinately, froma condition of rest in the driven shaft, to the same speed for bothshafts, (the driving shaft being assumed to run at constant speed) andwithout the use of gears or solid friction, as now commonly used.

I illustrate my invention by the accompanying drawings in which Figure 1is a longitudinal section of my device in the form of multiple pistonpump in which the cylinders and their pistons are parts of the device asfollows :To the driving shaft 1 is permanently fixed a housing orreservoir 7. In the forward end of this central well, which is best madeconical in form, is fitted the single controllin valve 8, WhlCh is alsoconical,-and adapted to regulate the area of the communicating ports 6,

where they enter the central Well or reservoir 7. This valve 8 is soconstructed and operated that it allows of a perfectly free passage forthe liquid when it is fully withdrawn, or, by sliding it forward, it maybe made to entirely close these ports thereby trapping the liquid in thepump chambers 4 and stopping the action of the istons 5 which in turnhold the two shafts 1n a fixed relation to each other. This valve 8 ismade hollow and open ended to allow of the free passage of the liquidthrough it to the central well or reservoir 7. The valve 8 is operatedby the rods 9 which pass through the stuffing boxes 10 and are connectedto the sliding collar 11 which is moved by the forked lever 12. All ofthe parts above enumerated except the driven shaft 2 alwa s rotate withthe driving shaft 1. To tie driven shaft 2 is permanently fixed a cam orinclinedfiange 13 which is provided with anti-friction ball hearin s incages or containing rings 14. The fiices of the cam are hardened andground true, and the bearing plates or rings 15 are also hardened andground in order to eliminate solid friction as far as possible. Theouter faces of these bearing plates or rings 15 are made rounding asshown, in order to maintain a fixed thickness for the whole arrangementof cam, ball bearings and bearing rings in all positions which it mayassume. arranged to pass through the rearward end of the housing orcasing 3 in the bearing 16. The hub 17 also fixed to the shaft 2 isprovided with a suitable anti-friction bearing 18 and a fiber washer 25as shown, to take the thrust from the piston 5 acting through the cam13. It will now be seen that any restriction of the ports 6 will causethe istons 5 to move more slowly in their cy inders than when the portsare wide 0 en, and, by

The shaft 2 isthis means, the speed of the driven shaft 2 speed of .thedriving shaft, and, at all times,

will transmit the required amount of power with ports 19, which admitthe fluid freely through the piston, to fill the chamber 4, when thepiston is on the return stroke, which freedom of circulation is requiredwhen the ports 6 are contr cted in area'by the valve 8. The notch 21 inthe piston stem provides for withdrawing the piston positively. 4

It is well known that all liquids expand by the action of heat,therefore a suflicient 'air space is leftin the casing to permit thisexpansion without injury to the machine. It is also well known thatwhenever friction of any 'kind is found heat will be generated.Therefore, provision is made for the radiation of this heat asparticularly shown by the ribs or flanges 32 in Fi 1. h

I-Iavin thus fully descri ed my invention what I c aim as new and desireto secure by Letters Patent is 1. In power-transmitting mechanism, thecombination ofalined shafts; a closed casing receiving said shafts fromopposite ends and attached to and rotatable with one of them, saidcasing having within it an annular series of piston chambers, each witha port opening 1nto the central s ace of said series; a piston in eachchamber; a rotatively differential connection between the pistons andthe other shaft to operate them; a hollow open ended valve seated in thecentral space of the piston chamber series, to con-- trol the ports ofsaid chambers tooperate the valve.

2. In power-transmitting mechanism, the

; and means combination of alined shafts; a closed casing receiving saidshafts from opposite ends and attached to and rotatable with one ofthem, said casing having within it an annular series of portopening 1ntothe central space of said series; a piston in each chamber; a flange onthe other shaft rotatively differentially engaging the pistons tooperate them; a holto operate said valve.

3. In power-transmitting mechanism, the

- combination of alined shafts;,a closed cas-- ing receiving said shaftsfrom opposite ends and attached 'to and rotatable with onengf them, saidcasing having within it an annular serles of piston chambers, each with'a iston chambers, each with a port opening into the central space ofsaid series; a piston in each chamber, each piston having a notchedstem; an inclined flange on the other shaft rotatively differentiallyengaging the notched stems-of said pistons to operate them; a hollowopen ended valve seated in the central space of the piston chamberseries, to control the ports of said chambers; and means to operate saidvalve.

. 4. In power-transmitting mechanism, the

combination of a driving shaft; a driven shaft in alinement with thedriving shaft; a closed casing receiving both shafts and attached -toand rotatable with one of them, 'said casing having within it an annularseries of piston chambers each with a port opening into the centralspace between the chambers, said space being of conical form;

a piston in each-chamber, each piston having a notched stem; an inclinedannular flange on the other shaft, said flange rota tivelydifferentially engaging the notched stems of the pistons;-a hollow openended conical valve in thecentral space of the piston chamber series tocontrol the ports of said chambers; and means to operate said valve. A

5. In power-transmitting mechanism, the

.combination of a driving and driven shaft;

a closed casing receiving said shafts and attached to and rotatable withone of them, said casing having within it an annular 'series of pistonchambers, each with a port opening into the central space of saidseries; a piston in each chamber, said piston havin an opening throughit controlled at one en by a valve; meansfor differentially connectingsaid pistons with the other shaft; a

hollow open ended valve seated in the centon in said chamber having apassage through it with an uncontrolled port at one end, and a valve atits other end controlling the coinmunication between said passage andthe port of the piston chamber; a rotatively diflie ferential connectionbetween the piston and the other shaft; and a valve 'in the casing tocontrol the port of the piston chamber.

' 7. In power-transmitting mechanism, the combination of alined-shafts;a closed casing receiving said shafts from opposite ends and attached toand rotatable with one of them, said casing having within it an annu larseries of piston chambers, leaving a space at each end of the casing anda cena tral space connecting said ends, each of said chambers at one endopening with its full cross sectional area into the casing and at theother end opening into said casing throng-h arelatively restricted port;a piston in each chamber having a passage through it with a port at oneend, and a valve at its other end controlling the communication betweensaid passage and the port of the piston chamber; a rotativelydifierential connection between the pistons and the other shaft tooperate them; and a hollow open ended valve seated in the central spaceof the piston chamber series and movable to 15 control the ports of saidchambers.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CHARLES DAVID MCCLINIOCK.

\Vitnesses:

\V M. F. Room, I). B. Rwlunns.

